i found the code while picking up some jigsaw puzzles, it's really not leaked by anyone.
just wanna tell you that solving this is like hitting my head agaist a wall. I'll get my revenge someday (・`ω´・)

i already feel cheaty enough when you gave me more hints. so this convo should end here, let us see the wall or my head, which is harder ヽ(`⌒´メ)ノ